Three-dimensional shaping cloth flattening device

Abstract

The three-dimensional shaping cloth flattening device comprises a base, a top plate and a lifting plate, a constant-pressure flattening head is arranged on the bottom face of the lifting plate, the constant-pressure flattening head comprises a constant-pressure air chamber shell, a flexible pressurizing bag and a constant-pressure mechanism, and the flexible pressurizing bag and the constant-pressure air chamber shell are connected in a sealed mode to jointly form a closed cavity; the constant-pressure mechanism is mounted in the constant-pressure air chamber shell and is used for providing constant reference pressure for the flexible pressurizing bag; a driving mechanism is fixedly arranged on the upper surface of the top plate and used for driving the constant-pressure leveling head to move relatively. According to the three-dimensional cloth flattening device, the problem that three-dimensional cloth is not completely flattened or damaged due to uneven pressure can be solved, and the high-quality and lossless three-dimensional flattening effect is achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of fabric processing equipment, and in particular relates to a fabric flattening device for three-dimensional shaping. Background Technology

[0002] In the fields of clothing manufacturing, home furnishing, and arts and crafts, smoothing and shaping fabrics with three-dimensional structures is a common but challenging process. These "three-dimensional fabrics" can be mainly divided into two types: First, "loose, hollow three-dimensional structures" formed through physical methods (such as drawstrings, pleats, and pinching), whose internal three-dimensional form lacks rigid support and can be easily compressed; second, "fabrics with fixed three-dimensional patterns" formed on a two-dimensional base fabric through techniques such as embroidery and appliqué, where the patterned portion is tightly integrated with the base fabric, possessing a certain degree of rigidity and stability, and maintaining a fixed shape.

[0003] The following issues arise during the smoothing process of fabrics with fixed three-dimensional patterns. These fabrics (such as cheongsam fabrics with exquisite embroidery or home textiles with three-dimensional appliqués) require perfect preservation and protection of their patterns. However, existing rigid flat irons apply immense concentrated pressure during pressing, flattening and damaging these delicate patterns, resulting in product damage. While operators can attempt to iron specific areas carefully, avoiding the patterns, this method is inefficient and easily creates new wrinkles in areas adjacent to the patterns, failing to achieve overall, high-quality smoothness. This has become a major bottleneck in the production of such high-end textiles.

[0004] In summary, the existing technology has the following problems: 1. It cannot adapt to curved surface shapes, resulting in extremely uneven distribution of pressure and heat, poor flatness, and easy damage to materials; 2. It lacks efficient and automated process flow, relying either on inefficient manual labor or on high-cost special molds, resulting in poor flexibility; Therefore, in order to solve the above problems, a three-dimensional shaping fabric flattening device is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a fabric flattening device for three-dimensional shaping, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to a three-dimensional shaping fabric flattening device, comprising a base, a top plate, and a lifting plate. The bottom surface of the lifting plate is equipped with a constant-pressure flattening head, which includes a constant-pressure air chamber shell, a flexible pressure bladder, and a constant-pressure mechanism. The flexible pressure bladder is sealed to the constant-pressure air chamber shell, forming a closed chamber. The constant-pressure mechanism is installed inside the constant-pressure air chamber shell to provide a constant reference pressure to the flexible pressure bladder. A driving mechanism is fixedly mounted on the upper surface of the top plate to drive the constant-pressure flattening head to move relative to the pressure bladder. Under the action of the constant-pressure mechanism, the flexible pressure bladder can adaptively flatten itself on the surface of the three-dimensional fabric and apply uniformly distributed pressure to the fabric.

[0007] Preferably, the constant pressure mechanism includes a counterweight plate that is slidably disposed within the housing of the constant pressure air chamber.

[0008] Preferably, the constant pressure leveling head further includes a heating plate and an elastic suspension mechanism. The heating plate is disposed inside the flexible pressure bladder, and the elastic suspension mechanism is connected between the heating plate and the constant pressure chamber shell. The elastic suspension mechanism allows the heating plate to float freely within the flexible pressure bladder. The bottom surface of the constant pressure chamber shell is provided with an annular groove, and the center position of the heating plate is provided with a slot, the position of which corresponds to the position of the annular groove.

[0009] Preferably, the elastic suspension mechanism includes a sleeve, a second spring is fixedly installed inside the sleeve, a limit plate is fixedly connected to the bottom end of the second spring, a telescopic rod is fixedly connected to the bottom surface of the limit plate, a connecting seat is connected to the bottom end of the telescopic rod via a ball joint, the connecting seat is fixedly connected to the heating plate, the upper end of the sleeve is threadedly connected to the constant pressure air chamber shell via a screw, a buffer pad is fixedly connected to the bottom surface of the heating plate, and a plurality of limit members for the maximum rotation angle of the ball joint are fixedly installed on the upper surface of the connecting seat.

[0010] Preferably, a fabric pre-tensioning mechanism is fixedly provided on the upper surface of the base.

[0011] Preferably, the fabric pre-tensioning mechanism is a negative pressure adsorption mechanism, which includes a placement plate and a piston cylinder. A plurality of support rods are fixedly connected between the placement plate and the base. A plurality of adsorption holes are opened on the upper surface of the placement plate. A sealed chamber is fixedly connected to the bottom surface of the placement plate. An air extraction pipe is fixedly connected between the piston cylinder and the sealed chamber. A piston plate is slidably disposed inside the piston cylinder. A piston rod is fixedly connected to one surface of the piston plate. A first spring is sleeved on the circumferential side of the piston rod. A first wedge block is fixedly connected to one end of the piston rod.

[0012] Preferably, a second wedge block is fixedly connected to the bottom surface of the lifting plate, the first wedge block and the second wedge block have the same inclination angle, and the position of the second wedge block corresponds to the position of the first wedge block. A second one-way valve is fixedly provided at one end of the piston cylinder, and a first one-way valve is fixedly provided on the front surface of the piston cylinder.

[0013] Preferably, the driving mechanism includes an electric push rod fixedly mounted on the top plate and several guide columns fixedly mounted on the upper surface of the base. The output end of the electric push rod is fixedly connected to the lifting plate, the upper end of the guide column is fixedly connected to the top plate, a connecting rod is fixedly connected to the bottom surface of the top plate, the bottom end of the connecting rod is connected to the constant pressure air chamber shell through a ball hinge, one end of the guide column passes through the lifting plate, and the lifting plate and the guide column are slidably engaged.

[0014] Preferably, a first connecting ring is fixedly connected to the peripheral side of the constant pressure chamber shell, a second connecting ring is fixedly connected to the bottom surface of the first connecting ring by bolts, the bottom surface of the second connecting ring is fixedly connected to the flexible pressure bladder, and a sealing ring is bonded between the first connecting ring and the second connecting ring.

[0015] Preferably, the inner wall of the constant pressure air chamber shell is provided with a plurality of sliding grooves, and the circumferential side of the counterweight plate is rotatably connected with a plurality of balls, one end of which is embedded in the sliding groove.

[0016] The present invention has the following beneficial effects: 1. This invention can solve the problem of incomplete flattening or damage to three-dimensional fabric caused by uneven pressure, and achieve a truly high-quality, non-destructive three-dimensional flattening effect. Specifically, it is achieved by setting a closed pressure chamber structure that combines a constant pressure chamber shell with a flexible pressure bladder, replacing the rigid working surface with a flexible interface that can be elastically deformed over a wide range. The constant pressure provided by the counterweight plate is transmitted to every part of the flexible pressure bladder through the internal medium. When the flattening head contacts the three-dimensional workpiece, the flexible pressure bladder can passively but precisely deform according to the geometry of the workpiece surface without any external control, thereby achieving a tight fit with the curved surface in a wrapping manner. This flattening method ensures that the pressure on the surface of the three-dimensional fabric remains consistent regardless of its unevenness, eliminating local pressure concentration or pressure blind spots. 2. This invention achieves a balance between uniform heat conduction and operational safety on complex curved surfaces. Specifically, it integrates an innovative suspended heating system within a flexible pressure bladder. This system uses an elastic suspension mechanism to "suspend" the heating plate within the flexible pressure bladder, transforming it from a rigid body into a heat source that responds to changes in external shape. When the flexible bladder deforms due to the workpiece's curved surface, its inner wall pushes the heating plate, forcing it to compress or stretch springs at different positions. This automatically adjusts its spatial posture, maintaining optimal contact with the fabric's curved surface. This not only ensures uniform and efficient heat conduction, avoiding localized overheating or underheating, but also sets the range of system movement through a mechanical limiting mechanism at the ball joint. This effectively prevents rigid contact and wear between the heating plate and the inner wall of the bladder caused by extreme tilting. Simultaneously, the elastic buffer layer at the bottom of the heating plate further softens the contact and promotes heat field homogenization, further improving the equipment's adaptability, heat uniformity, and safety. 3. This invention designs a fabric pre-tensioning mechanism that is precisely linked to the main lifting motion. This mechanism utilizes the downward movement of the lifting plate to convert vertical motion into horizontal linear motion through a set of precisely matched wedge blocks. This drives the piston pump to generate negative pressure, thereby automatically adsorbing and tensioning the fabric on the work platform before the flattening head contacts the fabric. This linkage design means that the two key processes of flattening and tensioning are seamlessly connected into a continuous and automated action cycle. It completely replaces the inefficient and unstable manual fabric stretching operation, ensuring that the fabric is in an ideal and consistent tension state before each flattening operation. This minimizes the initial wrinkles caused by fabric slack, laying a solid foundation for achieving perfect flatness and greatly improving production efficiency and product qualification rate.

[0017] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the front structure of the present invention; Figure 3 This is a schematic diagram of the right-side structure of the present invention; Figure 4 for Figure 3 A schematic diagram of the AA cross-sectional structure; Figure 5 This is a schematic diagram of the leveling mechanism of the present invention; Figure 6 for Figure 5 A schematic diagram of the exploded structure; Figure 7 This is a cross-sectional view of the constant pressure air chamber housing of the present invention; Figure 8 This is a schematic cross-sectional view of the flexible pressure bladder of the present invention; Figure 9 for Figure 8 A magnified schematic diagram of the partial structure at point A in the middle; Figure 10 This is a cross-sectional view of the fabric fixing mechanism of the present invention.

[0020] The components represented by each number in the attached diagram are listed below: 1. Base; 2. Top plate; 3. Lifting plate; 4. Guide column; 5. Electric push rod; 6. Support rod; 7. Placement plate; 8. Adsorption hole; 9. Piston cylinder; 10. Piston rod; 11. First wedge block; 12. Connecting rod; 13. Constant pressure chamber shell; 14. Flexible pressure bladder; 15. Second wedge block; 16. Limiting component; 17. First one-way valve; 18. Second one-way valve; 19. Sealed chamber; 20. Suction pipe; 21. Slide groove; 22. Piston plate; 23. First spring; 24. First connecting ring; 25. Sealing ring; 26. Second connecting ring; 27. Heating plate; 28. Buffer pad; 29. ​​Sleeve; 30. Counterweight plate; 31. Ball bearing; 32. Connecting seat; 33. Annular groove; 34. Telescopic rod; 35. Second spring; 36. Limiting plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "upper," "middle," "outer," "inner," etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention.

[0023] Example 1: This invention is a three-dimensional shaping fabric flattening device, comprising a base 1, a top plate 2, and a lifting plate 3. A driving mechanism is provided on the top plate 2. The driving mechanism includes an electric push rod 5 fixedly installed on the top plate 2 and several guide columns 4 fixedly installed on the upper surface of the base 1. The output end of the electric push rod 5 is fixedly connected to the lifting plate 3, and the upper end of the guide column 4 is fixedly connected to the top plate 2. The guide column 4 passes through the lifting plate 3 and slides with a linear bearing (not shown in the figure) installed on the lifting plate 3, thereby forming a lifting and guiding system to ensure that the lifting plate 3 can only perform stable vertical movement.

[0024] The bottom surface of the lifting plate 3 is connected to a constant pressure leveling head via a connecting rod 12. In order to allow the leveling head to be adjusted and adapted to its initial state, the bottom end of the connecting rod 12 is connected to the constant pressure air chamber housing 13 via a ball joint, allowing the leveling head to make fine angle adjustments in the initial contact with the curved surface.

[0025] The constant pressure leveling head consists of a constant pressure chamber shell 13 and a flexible pressure bladder 14, which are connected by a flange sealing structure. Specifically, a first connecting ring 24 is fixed to the circumferential side of the constant pressure chamber shell 13, and a second connecting ring 26 is fixed to the open end of the flexible pressure bladder 14. The first connecting ring 24 and the second connecting ring 26 are tightened by bolts, and a sealing ring 25 is provided at the connection position of the two connecting rings, so that the constant pressure chamber shell 13 and the flexible pressure bladder 14 together form a sealed pressure chamber. The flexible pressure bladder 14 is made of high temperature resistant, high pressure-resistant material. Made of elastic silicone material, to ensure its reliability and durability under long-term ironing conditions, the long-term operating temperature of the silicone material should not be lower than 200°C, and its Shore A hardness is preferably between 20HA and 40HA. This hardness range ensures that the flexible pressure bladder 14 has sufficient flexibility to conform to curved surfaces, while maintaining the necessary support strength to effectively transmit pressure. Furthermore, the optimal thickness range of the flexible pressure bladder 14 is determined to be 1.5mm to 3mm, and within this range, a uniform thickness of 2mm is preferred. This thickness achieves the best balance between flexibility, durability, and thermal conductivity.

[0026] In this embodiment, the constant pressure mechanism that provides a constant reference pressure for the sealed pressure chamber includes a counterweight plate 30 slidably disposed within the constant pressure chamber housing 13. The counterweight plate 30 uses its own weight to set a working pressure for the entire pressure system that does not depend on external power. Several sliding grooves 21 are provided on the circumferential side of the inner wall of the constant pressure chamber housing 13. At the same time, several balls 31 are rolledly connected to the circumferential side of the counterweight plate 30 through a retainer. The balls 31 are embedded in the sliding grooves 21 to form a low-friction sliding pair, which can minimize the frictional resistance between the counterweight plate 30 and the inner wall of the housing, and ensure the sensitivity and accuracy of the pressure response.

[0027] Working process: The electric push rod 5 drives the lifting plate 3 to descend, which in turn drives the constant pressure leveling head to press against the fabric covering the three-dimensional workpiece. Under the action of constant internal pressure, the flexible pressure bladder 14 passively deforms, tightly wraps the entire curved surface of the workpiece, and evenly transmits the constant pressure to all contact areas of the fabric, achieving non-destructive and efficient three-dimensional leveling.

[0028] Example 2: Based on Embodiment 1, this embodiment adds a heating function and solves the problems of how to uniformly conduct heat sources within the flexible bladder and ensure safe operation. In the constant pressure leveling head of this embodiment, a suspension heating system is added. This system includes a heating plate 27 disposed inside the flexible pressure bladder 14 and an elastic suspension mechanism connecting the heating plate 27 to the constant pressure air chamber shell 13. The specific structure of the elastic suspension mechanism is as follows: a sleeve 29 is connected to the bottom surface of the constant pressure air chamber shell 13 through a threaded hole. A second spring 35 is disposed inside the sleeve 29. A limit plate 36 is fixedly connected to the bottom end of the second spring 35. A telescopic rod 34 is fixedly connected to the bottom surface of the limit plate 36. The bottom end of the telescopic rod 34 is connected to a connecting seat 32 fixed to the upper surface of the heating plate 27 through a ball joint. Its function is to provide stable initial pressure using the second spring 35 and allow the telescopic rod 34 to extend and retract, to transmit pressure using the telescopic rod 34 and constrain the motion trajectory, and to provide multi-degree-of-freedom rotation capability using the ball joint, so that the heating plate 27 becomes a moving body suspended in the flexible pressure bladder 14, and can make adaptive movements such as tilting and floating up and down following the deformation of the flexible pressure bladder 14, ensuring that its working surface maintains the best fit with the curved surface of the fabric, thereby achieving uniform heat conduction.

[0029] On the upper surface of the connecting seat 32, a number of limiting members 16 are fixedly provided. The function of the limiting members 16 is to limit the maximum rotation angle of the ball hinge.

[0030] In addition, a cushioning pad 28 is also attached to the bottom surface of the heating plate 27. The pad is made of high-temperature resistant silicone foam or ceramic fiber felt. Its functions are as follows: first, as a heat buffer layer to even out the heat on the surface of the heating plate and avoid local overheating; second, as a mechanical buffer layer to absorb the instantaneous impact force between the heating plate 27 and the inner wall of the flexible pressure bladder 14 and provide a gentler contact.

[0031] To ensure that the air pressure connection between the constant pressure chamber shell 13 and the flexible pressure bag 14 is not blocked by the heating plate 27, an annular groove 33 is provided on the bottom surface of the constant pressure chamber shell 13, and a corresponding slot is provided at the center of the heating plate 27, together forming a continuous air pressure channel.

[0032] Example 3: Based on Embodiment 2, this embodiment further adds an automated fabric pretreatment function to improve the overall system's operating efficiency and flatness quality. In this embodiment, a fabric pre-tensioning mechanism is fixedly provided on the upper surface of the base 1. This mechanism is preferably a negative pressure adsorption mechanism, which includes a placement plate 7 for holding the fabric and three-dimensional workpiece. The placement plate 7 is fixed above the base 1 by a support rod 6, and its upper surface is densely covered with adsorption holes 8; a sealed chamber 19 fixed to the bottom surface of the placement plate 7; and a piston cylinder 9 connected to the sealed chamber 19 through an air extraction pipe 20.

[0033] A piston plate 22 is slidably disposed inside the piston cylinder 9. A piston rod 10 is fixedly connected to the piston plate 22. A first spring 23 providing a restoring force is sleeved on the piston rod 10. A first wedge block 11 is fixed at its end. Correspondingly, a second wedge block 15 is fixed on the bottom surface of the lifting plate 3. Its inclined surface matches and corresponds to the inclined surface of the first wedge block 11. Furthermore, the position of the second wedge block 15 also corresponds to the position of the first wedge block 11.

[0034] When the lifting plate 3 is driven to move downward, the inclined surface of the second wedge block 15 on it will press against the inclined surface of the first wedge block 11, converting the vertical movement of the lifting plate into the horizontal movement of the piston rod 10, driving the piston plate 22 to slide inside the piston cylinder 9. Through the cleverly set first one-way valve 17 (allowing external air to enter) and second one-way valve 18 (allowing gas to be discharged only to the exhaust pipe 20) on the piston cylinder 9, a highly efficient piston pump function is realized. This allows the preparatory action of fabric tensioning and the flattening action of the equipment to be completed automatically and sequentially by a single power source, without the need for an additional control system. This not only greatly improves production efficiency, but also creates stable and ideal initial conditions for the subsequent constant pressure flattening process by automatically eliminating fabric wrinkles before flattening, fundamentally ensuring the high quality and consistency of the final product.

[0035] Working principle: First, the fabric is pre-tensioned: the starting device activates the electric push rod 5, driving the lifting plate 3 to move downwards along the guide column 4; the second wedge block 15 on the bottom surface of the lifting plate 3 descends accordingly, and its inclined surface contacts and compresses the inclined surface of the first wedge block 11 fixed at the end of the piston rod 10; this inclined surface cooperation converts the vertical movement of the lifting plate into the horizontal outward movement of the piston rod 10, overcoming the elastic force of the first spring 23, and pulling the piston plate 22 to move inside the piston cylinder 9. This process increases the internal volume of the piston cylinder 9, reduces the internal air pressure, and forms a negative pressure; at this time, the first one-way valve 1... 7 closes under the action of pressure difference, the second one-way valve 18 opens, and external air is drawn into the piston cylinder 9 through the air extraction pipe 20; when the lifting plate 3 rises, the second wedge block 15 separates from the first wedge block 11, and the piston plate 22 moves inward under the action of the restoring force of the first spring 23, compressing the air in the cylinder; at this time, the second one-way valve 18 closes, and the compressed air pushes open the first one-way valve 17 to be discharged; through this cycle, a stable negative pressure is formed in the sealed chamber 19 below the placement plate 7, and the fabric covering it is evenly adsorbed and tightened through the adsorption hole 8, preparing for subsequent flattening; Next, adaptive three-dimensional leveling and heating are performed; the constant pressure leveling head continues to press down with the lifting plate 3; the flexible pressure bladder 14 contacts the tensioned fabric and the three-dimensional workpiece below; under the action of the constant pressure mechanism, that is, the counterweight plate 30 generates a constant pressure on the gas in the sealed chamber through gravity, and this pressure is transmitted to the entire inner wall of the flexible pressure bladder 14 without loss; facing the complex curved surface of the workpiece, the flexible pressure bladder 14 deforms to different degrees in different parts, the protrusions are compressed, and the concave parts expand, thereby adaptively wrapping the entire curved surface and applying a globally uniform pressure to the fabric; Meanwhile, the deformation of the bladder pushes the heating plate 27 from the inside. Supported by the second spring 35 of the elastic suspension mechanism, the telescopic rod 34, and the ball hinge, the heating plate 27 floats and tilts accordingly by compressing or stretching the second spring 35 at different positions and utilizing the rotational freedom of the ball hinge, so that its lower surface is dynamically kept in contact with the curved surface of the fabric through the cushioning pad 28. During this process, the limiting member 16 ensures that the rotation angle of the ball hinge is within a safe range, preventing the heating plate 27 from tilting excessively and damaging the inner wall of the flexible pressure bladder 14. The heat generated by the heating plate 27 after being powered on is homogenized by the cushioning pad 28 and then conducted to the fabric through the wall of the flexible pressure bladder 14, achieving uniform "hot pressing" flatness. After the leveling operation is completed, the electric push rod 5 drives the lifting plate 3 to rise, the constant pressure leveling head leaves the fabric, and all moving parts are reset under the action of gravity and spring force, first spring 23 and second spring 35, waiting for the next work cycle.

[0036] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A three-dimensional shaping fabric flattening device, comprising a base (1), a top plate (2), and a lifting plate (3), characterized in that, The bottom surface of the lifting plate (3) is provided with a constant pressure leveling head. The constant pressure leveling head includes a constant pressure air chamber shell (13), a flexible pressure bladder (14) and a constant pressure mechanism. The flexible pressure bladder (14) is sealed to the constant pressure air chamber shell (13) to form a sealed chamber. The constant pressure mechanism is installed inside the constant pressure air chamber shell (13) to provide a constant reference pressure to the flexible pressure bladder (14); the upper surface of the top plate (2) is fixedly provided with a driving mechanism to drive the constant pressure leveling head to move relative to it. The flexible pressure bladder (14) can adaptively lie flat on the surface of the three-dimensional fabric under the action of the constant pressure mechanism and apply uniform pressure to the fabric.

2. The fabric smoothing device for three-dimensional shaping according to claim 1, characterized in that, The constant pressure mechanism includes a counterweight plate (30) that is slidably disposed within the housing (13) of the constant pressure air chamber.

3. The fabric smoothing device for three-dimensional shaping according to claim 2, characterized in that, The constant pressure leveling head also includes a heating plate (27) and an elastic suspension mechanism. The heating plate (27) is disposed inside the flexible pressure bladder (14), and the elastic suspension mechanism is connected between the heating plate (27) and the constant pressure air chamber shell (13). The elastic suspension mechanism enables the heating plate (27) to float freely within the flexible pressure bladder (14) with multiple degrees of freedom. The bottom surface of the constant pressure air chamber shell (13) is provided with an annular groove (33), and the center of the heating plate (27) is provided with a slot, the position of which corresponds to the position of the annular groove (33).

4. The fabric smoothing device for three-dimensional shaping according to claim 3, characterized in that, The elastic suspension mechanism includes a sleeve (29), a second spring (35) is fixedly installed inside the sleeve (29), a limit plate (36) is fixedly connected to the bottom end of the second spring (35), a telescopic rod (34) is fixedly connected to the bottom surface of the limit plate (36), a connecting seat (32) is connected to the bottom end of the telescopic rod (34) by a ball joint, the connecting seat (32) is fixedly connected to the heating plate (27), the upper end of the sleeve (29) is threadedly connected to the constant pressure air chamber shell (13) by a screw, a buffer pad (28) is fixedly connected to the bottom surface of the heating plate (27), and a number of limit members (16) for the maximum rotation angle of the ball joint are fixedly installed on the upper surface of the connecting seat (32).

5. The fabric smoothing device for three-dimensional shaping according to claim 1, characterized in that, The upper surface of the base (1) is fixedly provided with a fabric pre-tensioning mechanism.

6. The fabric smoothing device for three-dimensional shaping according to claim 5, characterized in that, The fabric pre-tensioning mechanism is a negative pressure adsorption mechanism, which includes a placement plate (7) and a piston cylinder (9). Several support rods (6) are fixedly connected between the placement plate (7) and the base (1). Several adsorption holes (8) are opened on the upper surface of the placement plate (7). A sealed chamber (19) is fixedly connected to the bottom surface of the placement plate (7). An air extraction pipe (20) is fixedly connected between the piston cylinder (9) and the sealed chamber (19). A piston plate (22) is slidably arranged inside the piston cylinder (9). A piston rod (10) is fixedly connected to one surface of the piston plate (22). A first spring (23) is sleeved on the circumferential side of the piston rod (10). A first wedge block (11) is fixedly connected to one end of the piston rod (10).

7. The fabric smoothing device for three-dimensional shaping according to claim 6, characterized in that, The bottom surface of the lifting plate (3) is fixedly connected to a second wedge block (15). The inclined angles of the first wedge block (11) and the second wedge block (15) are the same, and the position of the second wedge block (15) corresponds to the position of the first wedge block (11). A second one-way valve (18) is fixedly provided at one end of the piston cylinder (9), and a first one-way valve (17) is fixedly provided on the front surface of the piston cylinder (9).

8. The fabric smoothing device for three-dimensional shaping according to claim 1, characterized in that, The driving mechanism includes an electric push rod (5) fixedly installed on the top plate (2) and several guide columns (4) fixedly installed on the upper surface of the base (1). The output end of the electric push rod (5) is fixedly connected to the lifting plate (3). The upper end of the guide column (4) is fixedly connected to the top plate (2). A connecting rod (12) is fixedly connected to the bottom surface of the top plate (2). The bottom end of the connecting rod (12) is connected to the constant pressure air chamber shell (13) through a ball hinge. One end of the guide column (4) passes through the lifting plate (3), and the lifting plate (3) and the guide column (4) slide together.

9. The fabric smoothing device for three-dimensional shaping according to claim 1, characterized in that, A first connecting ring (24) is fixedly connected to the periphery of the constant pressure chamber shell (13). A second connecting ring (26) is fixedly connected to the bottom surface of the first connecting ring (24) by bolts. The bottom surface of the second connecting ring (26) is fixedly connected to the flexible pressure bladder (14). A sealing ring (25) is bonded between the first connecting ring (24) and the second connecting ring (26).

10. A fabric smoothing device for three-dimensional shaping according to claim 2, characterized in that, The inner wall of the constant pressure air chamber shell (13) is provided with several sliding grooves (21), and the outer wall of the counterweight plate (30) is connected with several rolling balls (31), one end of the rolling balls (31) is embedded in the sliding groove (21).

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